package cn.itheima.servlet;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.PrintWriter;
import java.text.SimpleDateFormat;
import java.util.Date;

@WebServlet("/ServletTest1")
public class ServletTest1 extends HttpServlet {
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        //1.通过响应对象写出提示信息
        response.setContentType("text/html;charset=UTF-8");
        PrintWriter pw = response.getWriter();
        pw.write("欢迎访问本网站，您的最后访问时间为：<br>");
        //2.创建Cookie对象，用于记录最后访问时间
        Cookie cookie = new Cookie("time", System.currentTimeMillis()+"");

        //3.设置最大存活时间
        //cookie.setMaxAge(3600);
        cookie.setMaxAge(3600);    // 立即清除

        //4.将cookie对象添加到客户端
        response.addCookie(cookie);
        //5.获取cookie
        Cookie[] arr = request.getCookies();
        for (Cookie c : arr) {
            if ("time".equals(c.getName())) {
                //6.获取cookie对象中的value，进行写出
                String value = c.getValue();
                SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
                pw.write(sdf.format(new Date(Long.parseLong(value))));
            }
        }
    }

    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        this.doGet(request, response);
    }
}
